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2.2 Animal tissues, organs and organ systems

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Question 28
F

Which change would increase the rate at which oxygen diffuses into the blood in the lungs?

[1]
A

an increase in the number of capillaries around each alveolus

B

an increase in the thickness of the wall of each alveolus

C

a decrease in the number of alveoli in each of the lungs

D

a decrease in the rate at which blood flows through the lungs

Markscheme

2.2 Animal tissues, organs and organ systems Questions

  1. GCSE
  2. /Biology
  3. /2.2 Animal tissues, organs and organ systems

179 exam-style questions on AQA GCSE Biology 2.2 Animal tissues, organs and organ systems, covering 2.2.1 The human digestive system, 2.2.2 The heart and blood vessels, 2.2.3 Blood, 2.2.4 Coronary heart disease: a non-communicable disease, 2.2.5 Health issues, 2.2.6 The effect of lifestyle on some non-communicable diseases, and 2.2.7 Cancer. Each one has a worked solution and a mark scheme showing where the marks go.

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